<template>
  <div>
    <!--面包屑导航区-->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!--卡片视图-->
    <el-card>
      <!--添加角色按钮区域-->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisibleRoles = true">添加角色</el-button>
        </el-col>
      </el-row>

      <!--添加角色按钮的对话框-->
      <el-dialog title="添加角色" :visible.sync="addDialogVisibleRoles" width="50%" @close="addRolesDialogClosed">
        <!--对话框内容主体区域-->
        <el-form :model="addRolesForm" :rules="addRolesFormRules" ref="addRolesFormRef" label-width="80px">
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="addRolesForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="addRolesForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
              <el-button @click="addDialogVisibleRoles = false">取 消</el-button>
              <el-button type="primary" @click="addRoles">确 定</el-button>
              </span>
      </el-dialog>

      <!--角色列表区域-->
      <el-table :data="rolesList" border stripe>
        <!--展开列-->
        <el-table-column type="expand">
          <template v-slot="scope">
            <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children"
                    :key="item1.id">
              <!--渲染一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-arrow-right"></i>
              </el-col>
              <!--渲染二级和三级权限-->
              <el-col :span="19">
                <!--通过for循环嵌套循环二级权限-->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children"
                        :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{
                        item2.authName
                      }}
                    </el-tag>
                    <i class="el-icon-arrow-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3, i3) in item2.children" :key="item3.id"
                            closable @close="removeRightById(scope.row, item3.id)">
                      {{ item3.authName }}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <!--索引列-->
        <el-table-column type="index"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template v-slot="scope">
            <!--编辑角色信息-->
            <el-button size="mini" tynpm type="primary" icon="el-icon-edit" @click="showEditRolesDialog(scope.row.id)">
              编辑
            </el-button>
            <!--删除角色信息-->
            <el-button size="mini" type="danger" icon="el-icon-delete" @click="removeRoleById(scope.row.id)">删除
            </el-button>
            <!--分配角色权限-->
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限
            </el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>


    <!--编辑角色信息对话框-->
    <el-dialog title="编辑角色信息" :visible.sync="editDialogVisibleRoles" width="50%" @close="editRolesDialogClosed">
      <!--对话框内容主体区域-->
      <el-form :model="editRolesForm" :rules="editRolesFormRules" ref="editRolesFormRef" label-width="80px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editRolesForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="editRolesForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
              <el-button @click="editDialogVisibleRoles = false">取 消</el-button>
              <el-button type="primary" @click="editRolesInfo">确 定</el-button>
              </span>
    </el-dialog>

    <!--分配权限的对话框-->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDiaClose">
      <!--树形控件-->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox default-expand-all node-key="id"
               :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  name: "Roles",
  data() {
    return {
      //所有角色列表数据
      rolesList: [],
      //所有权限列表数据
      rightsList: [],
      //控制添加角色对话框的显示与隐藏
      addDialogVisibleRoles: false,
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible: false,
      //添加角色的表单数据
      addRolesForm: {
        roleName: '',
        roleDesc: ''
      },
      //添加角色表单的验证规则对象
      addRolesFormRules: {
        roleName: [
          {required: true, message: '请输入角色名称', trigger: 'blur'},
          {min: 2, max: 10, message: '角色名称长度在 2 到 10 个字符', trigger: 'blur'}
        ],
        roleDesc: [
          {required: true, message: '请输入角色描述', trigger: 'blur'},
          {min: 2, max: 10, message: '角色描述长度在 2 到 10 个字符', trigger: 'blur'}
        ]
      },
      //控制编辑角色对话框的显示与隐藏
      editDialogVisibleRoles: false,
      //查询到的角色信息对象保存
      editRolesForm: {},
      //修改表单的验证规则对象
      editRolesFormRules: {
        roleName: [
          {required: true, message: '请输入角色名称', trigger: 'blur'},
          {min: 2, max: 10, message: '角色名称长度在 2 到 10 个字符', trigger: 'blur'}
        ],
        roleDesc: [
          {required: true, message: '请输入角色描述', trigger: 'blur'},
          {min: 2, max: 10, message: '角色描述长度在 2 到 10 个字符', trigger: 'blur'}
        ]
      },
      //树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      //默认选中的节点id值数组
      defKeys: [],
      //当前即将分配权限的角色的id
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    //获取所有角色列表
    async getRolesList() {
      const {data: res} = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取所有角色列表失败！')
      } else {
        this.rolesList = res.data
      }
    },
    //监听添加角色对话框关闭的事件
    addRolesDialogClosed() {
      this.$refs.addRolesFormRef.resetFields()
    },
    //添加角色
    addRoles() {
      this.$refs.addRolesFormRef.validate(async valid => {
        if (!valid) {
          return
        }
        const {data: res} = await this.$http.post('roles', this.addRolesForm)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败!')
        } else {
          this.$message.success('添加角色成功！')
          this.addDialogVisibleRoles = false
          this.getRolesList()
        }
      })
    },
    //监听编辑角色对话框关闭的事件
    editRolesDialogClosed() {
      this.$refs.editRolesFormRef.resetFields()
    },
    //展示修改角色信息的对话框
    async showEditRolesDialog(id) {
      this.editDialogVisibleRoles = true
      const {data: res} = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200) {
        return this.$message.error('查询角色信息失败!')
      }
      this.editRolesForm = res.data                /*把查询到的数据保存到一个editRolesForm表单中*/
    },
    //提交编辑好的角色信息
    editRolesInfo() {
      this.editDialogVisibleRoles = false
      this.$refs.editRolesFormRef.validate(async valid => {
        if (!valid) return
        const {data: res} = await this.$http.put('roles/' + this.editRolesForm.roleId, {
          roleName: this.editRolesForm.roleName,
          roleDesc: this.editRolesForm.roleDesc
        })
        if (res.meta.status !== 200) {
          return this.$message.error('编辑角色信息失败!')
        }
        this.editDialogVisibleRoles = false
        this.getRolesList()
        this.$message.success('编辑角色信息成功！')
      })
    },
    //根据id删除对应的角色信息
    async removeRoleById(id) {
      //弹框询问用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      //如果用户确认删除，则返回值为字符串 confirm
      //如果用户取消删除，则返回值为字符串 cancel
      console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除!')
      } else {
        const {data: res} = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) {
          return this.$message.error('删除角色信息失败!')
        } else {
          this.$message.success('删除角色信息成功!')
          this.getRolesList()
        }
      }
    },
    //根据id删除对应的权限
    async removeRightById(role, rightId) {
      //弹框询问用户是否删除
      const confirmResult = await this.$confirm('此操作将永久删除该角色的权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      //如果用户确认删除，则返回值为字符串 confirm
      //如果用户取消删除，则返回值为字符串 cancel
      console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除!')
      } else {
        const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)    //模板字符串拼接
        if (res.meta.status !== 200) {
          return this.$message.error('删除权限失败!')
        } else {
          this.$message.success('删除权限成功!')
          role.children = res.data         //重新为角色赋最新返回的值
        }
      }
    },
    //展示分配权限的对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      // 获取所有权限的数据
      const {data: res} = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取数据失败!')
      }
      // 获取到的权限数据保存
      this.rightsList = res.data
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 递归的形式,获取角色下所有的三级权限的id,并保存到 defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前node没有children属性则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))     //23
    },
    //监听分配权限对话框的关闭事件
    setRightDiaClose() {
      this.defKeys = []
    },
    //点击为角色分配权限
    async allotRights() {
      const keys = [...this.$refs.treeRef.getCheckedKeys(), ...this.$refs.treeRef.getHalfCheckedKeys()]        //...是展开运算符
      const idStr = keys.join(',')
      const {data: res} = await this.$http.post(`roles/${this.roleId}/rights`, {rids: idStr})
      if (res.meta.status !== 200) {
        return this.$message.error('角色权限分配失败！')
      }
      this.$message.success('角色权限分配成功！')
      this.getRolesList()
      this.setRightDialogVisible = false
    },
  }
}
</script>

<style scoped>

</style>